Results 121 to 130 of about 139,565 (215)
International Journal of Mining Science and TechnologyIn order to solve the problem that current theory models cannot accurately describe thick-hard roof (THR) elastic energy and assess the mine tremor disasters, a theoretical method, a Timoshenko beam theory on Winkler foundation was adopted to establish ...
Bin Yu +3 more
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Meitan xuebaoTaking the 11–3106 working face of Menkeqing Coal Mine as the research background, a fracture model of the structure covered by thick and hard overburden at the 11–3106 working face was established.
Mingyue WENG +5 more
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Field Report on the Excavation of Indian Villages in the Vicinity of the Spiro Mounds, Leflore County, Oklahoma [PDF]
, 2000 A wealth of strikingly unusual and beautiful objects of Indian manufacture were excavated from the burials of the Spiro Mound, Leflore (sic.) County, Oklahoma during 1936-37.
Orr, Kenneth G.
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Practice of deep hole blasting and rapid charging technology for composite thick and hard roof
Meikuang AnquanIn order to control the dynamic pressure behavior of the working face under the condition of composite thick and hard roof, taking a mine in Ordos as an example, through theoretical analysis, it is clarified that the instability of small coal pillar roadway with thick and hard roof is mainly divided into deformation instability and impact instability ...
Huijie BI, Yunlong MO, Shaogang LI
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Mechanism and control of deformation in mining roadways with hard roofs in extra-thick coal seams
Frontiers in MaterialsIntroduction The mining roadways for the exceptionally thick coal seams 3-5 at Tashan Colliery in the Datong Mining District faced the challenge of significant and uncontrollable surrounding rock deformation under hard roof strata conditions, posing a serious threat to safe and efficient operations.
Wen-Zhe Gu +7 more
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Geomechanics and Geophysics for Geo-Energy and Geo-ResourcesTheoretical analysis, micro-seismic monitoring, and on-site research were used to examine the main disaster-causing strata of composite hard roof, with a particular focus on rockburst in the working face of thick coal seams.
Xukai Dong +4 more
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Prevention and control mechanism of deep-hole blasting in deep mining
Yantu gongcheng xuebaoMost of the coal mines in East China, Northeast China and North China have been mined below 600 m in depth, and dynamic disasters such as mine earthquakes have occurred frequently, which have seriously restricted the safety, green and efficient ...
ZHANG Quan 1, 2, ZOU Junpeng 1, WU Kunbo 1, JIAO Yuyong 1, JIANG Yujing 2, WANG Chao 3, YAN Xianyang 3
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, 2013 My medicine has its own special place in our downstairs bathroom. It rests on a little metal shelf by the shower, standing among the bright orange bottles of multivitamins, B12, vitamin C, and calcium chews.
Kirkland, Chandra R
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Mechanism of reverse fault activation when mining under the condition of thick and hard roof
Meitan kexue jishuIn order to study the mechanical mechanism of the instability of the reverse fault in the working face under the condition of thick and hard roof, the spatial relationship model between the overburden movement area and the fault plane was established through the relationship among the size of the coal pillar at the fault boundary, the fault dip angle ...
Weijian YU +5 more
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Golemo Gradište at Konjuh: An Unidentified Late Antique City and Its Churches
, 2013 This article provides an overview of the city as we saw it in 2008.
Snively, Carolyn S.
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